package org.persistent.impl;

import org.domain.LineItem;
import org.persistent.DBUtil;
import org.persistent.LineItemDAO;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

public class LineItemDAOImpl implements LineItemDAO {
    String GET_LINEITEM_BY_ORDERID =
            "SELECT ORDERID,LINENUM AS lineNumber,ITEMID,QUANTITY,UNITPRICE FROM LINEITEM WHERE ORDERID = ?";
    String INSERT_LINEITEM=
            "INSERT INTO LINEITEM (ORDERID, LINENUM, ITEMID, QUANTITY, UNITPRICE) VALUES (?, ?, ?, ?, ?)";
    @Override
    public List<LineItem> getLineItemsByOrderId(int orderId) {
        List<LineItem>lineItems = new ArrayList<>();
        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement preparedStatement = connection.prepareStatement(GET_LINEITEM_BY_ORDERID);
            preparedStatement.setInt(1, orderId);
            ResultSet resultSet = preparedStatement.executeQuery();
            while (resultSet.next()) {
                LineItem lineItem = new LineItem();
                lineItem.setOrderId(resultSet.getInt(1));
                lineItem.setLineNumber(resultSet.getInt(2));
                lineItem.setItemId(resultSet.getString(3));
                lineItem.setQuantity(resultSet.getInt(4));
                lineItem.setUnitPrice(resultSet.getBigDecimal(5));
                lineItems.add(lineItem);
            }

            DBUtil.closeResultSet(resultSet);
            DBUtil.closePreparedStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return lineItems;
    }

    @Override
    public void insertLineItem(LineItem lineItem) {
        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement preparedStatement = connection.prepareStatement(INSERT_LINEITEM);
            preparedStatement.setInt(1, lineItem.getOrderId());
            preparedStatement.setInt(2, lineItem.getLineNumber());
            preparedStatement.setString(3, lineItem.getItemId());
            preparedStatement.setInt(4, lineItem.getQuantity());
            preparedStatement.setBigDecimal(5, lineItem.getUnitPrice());
            preparedStatement.executeUpdate();

            DBUtil.closePreparedStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
